<template>
    <div>
        <input type= "button"value="+1"@click="addNum"/>
        {{num}}
        <input type="button" value="-1" @click="subNum"/>
    </div>
</template>
<script>
export default {
  data() {
    return { num: 0 };
  },
  methods: {
    addNum() {
      this.num++;
    },
    subNum() {
      this.num--;
    }
  }
};
</script>

<style>
</style>